Just as it is the default tool for most businesses, email’s capacity for rapid, mass communication has made it a favourite instrument of criminals. As a result, malicious emails have become a common occurrence in most consumer and business inboxes. Although chances are that most people will correctly identify the most common malicious emails as fraudulent, many will fail to correctly identify sophisticated email attacks as unsafe. Familiarity can breed contempt, and all users are now at risk from increasingly more advanced email attacks, which have become vastly more sophisticated in the last few years.
For full article: https://www.helpnetsecurity.com/2017/04/27/taxonomy-malicious-emails/